Five Nights at the Krusty Krab is the official prequel to Five Nights at the Chum Bucket, and was released on January 29th, 2015. It is the first in the series.
Mr. Krabs had decided to open up a brand new Krusty Krab in the city. He builds animatronic versions of the older employee's (since it was cheaper then paying their salaries), and hires two humans to keep charge of the restaurant, the player, and the Phone Guy. When it turns night, the player begins their night shift and these animatronics go on a hunting spree for blood. Your blood.
Mr Krabs has opened a brand new Krusty Krab in the city, staffed completely by animatronic versions of his old employees (because it was cheaper than paying their salary's). You are hired as the night watchman at this new restaurant, however strange things begin to happen as the lights go out, and you find yourself in a greater danger than you had expected...
Cameras are the most important aspect of survival. The cameras are used to scout out where the animatronics are, and to stop SpongeBob SquarePants and Sandy Cheeks at different locations. Use the cameras wisely, because they do use power.
Power is a aspect that needs to be maintained. You can not gain power back, you can only lose it at different rates. Using both doors, the cameras, and the flashlight on the middle of your desk will give max power loss. You start at 100%, and the facility shuts down at 0%.
The flashlight is a useful tool to stop Squidward Tentacles. Squidward appears through the window frame at the front of your office, and if the player does not continuously "spam" the light at it, Squidward will lunge towards the player, causing a game over.
There are three doors in the game overall. Two in the office (to stop any animatronic from entering from the sides, ex. SpongeBob, Patrick, Sandy...) and one on your cameras. The door on your camera does not take power away from the overall power loss. That door can stop Sandy Cheeks, and SpongeBob SquarePants from nearing the office. Unlike Five Nights at the Chum Bucket, the doors do not overheat. But, they can "break" if an animatronic stands outside one for too long.